Organizing Data
Data Relationships
Producing Data & Experiments
Probability & Distributions
Inference & Tests
100
This measure of center is more resistant to outliers than the mean.
What is the median?
100
observed y - predicted y
What is the residual?
100
This phrase is used to describe an observed effect so large that it would rarely occur by chance.
What is statistically significant?
100
This type of random variable requires a fixed number of trials.
What is a binomial random variable?
100
The type of significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test (or T procedure)?
200
To calculate, subtract the mean of the distribution from the observed x, then divide by the standard deviation.
What is the z-score (or standardized value)?
200
Measures the direction and strength of a linear relationship between two quantitative variables.
What is correlation (or r)?
200

Researchers divide a population into small heterogeneous groups. They then randomly select a few of these smaller groups and select every unit in the groups to form a sample.

What is cluster sampling?

200
The type of variable where the probability distribution assigns probability as the area under the density curve above a specific interval.
What is a continuous random variable?
200

The formula to calculate the z statistic for a one-sample test for population proportion.

What is z = (p̂ minus p) divided by sqrt(pq/n) ?

300
This rule helps to determine if data is normally distributed by checking the number of observations within each interval.
What is the 68-95-99.7 rule?
300
The fraction of the variables in the values of y that is explained by the LSR of y on x.
What is the coefficient of determination (or r squared)?
300
This experimental design involves the random assignment of units to treatments which are carried out separately within each group of units known to be similar in some way that is expected to affect the responses.
What is block design?
300
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are disjoint events (or mutually exclusive events)?
300

The conditions to use this test include all expected counts be greater than or equal [[to 1 and no more than 20% of all the expected counts be less]] than 5. (the part in brackets is what you'll use in the wild, but on the AP you could just use expecteds at least 5)

What is the goodness of fit (or chi-square) test?

400
The square of the standard deviation.
What is the variance?
400
Applying a logarithmic transformation to both variables causes this type of model to become linear.
What is a power model?
400
The 3 basic principles of experimental design.
What are control, randomize, and replicate?
400
The condition involving the population size that must be satisfied to use sigma divided by the square root of n as the standard deviation of a sampling distribution.
What is 'the population is at least 10 times the sample size'?
400

Two of the conditions to be verified for inference about a proportion.

What are the population size be greater than or equal to 10n and n times p hat & n times (1 - p hat) be greater than or equal to 10? (SRS could also be one of the two)

500
This calculator command can be used to find the area under a normal distribution and above an interval.
What is normalcdf?
500

Linear, Indepedent, Normal distribution of residuals, Equal variance of residuals, and Random

What are the assumptions for a linear regression t-test?

500

State/describe the problem, state assumptions, assign digits, simulate repetition, and state the conclusion.

What are the five steps of a simulation?

500

The formula to determine the variance for a discrete random variable with three possible values.

What is sigma sub x squared = (the square of the difference between x sub 1 and mu multiplied by p sub 1) + (the square of the difference between x sub 2 and mu multiplied by p sub 2) + (the square of the difference between x sub 3 and mu multiplied by p sub 3) ?

500
b +/- t*SE sub b
What is the confidence interval for slope beta of a true regression line?
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